Explicație pas cu pas:
1.
45:9=4
80:8=10
63:7=9
2.
a) 30:6=5
b) 36:4=9
c) 18:2=9
9:3=3
3.
a). 64:8+35:7-4 = 8+5-4=9
b)92-9x8+56:7=92-72+8=28
c)9x9-(26+19):5=81-45:5=81-9=72
d) 41-32:4:4= 41-2=39
4.
a) 8xa=40
a=40:8
a=5
b) b:6=9
b=6x9
b=54
c) 72:c=8
c=72:8
c=9
5. [60-(5x8)] :2 =
5x8=40
60-40=20
20:2=10
RĂSPUNS : 10 TIMBRE
